One pipe hot water ????

ScottMP

you have an air vent on each heat emitter. You can't power purge these systems.

I like monoflow systesm and use them quite frequently.

Scott

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Leo G_101

Wondering about

mono-flow tees.

1 - from what I understand, only one tee is needed per radiator if the flow is up from the line

2 - If rad is down from line, then a mono is needed at both S & R

3 - Circulator should be sized at least 1 size larger then normal if using mono's

Other things that I should be aware of?????

Thanx!

Leo G

Boilerpro_5

ETC.

These systems trap air very easily so defintiely pump away from your air separator. Also, you have a great opportunity to install TRV in each room for room by room control.

Boilerpro

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[Deleted User]

Boilerpro.

Would a closed TRV not be the same as removing the radiator from the system for the time it is closed? I ask because of what Dan says on page 11 of his Q & A on Diverter Tee Systems.

[Deleted User]

Yeah but....

and theres a BUTT in EVERY crowd...

The valve, if properly set and adjusted will NEVER be completely closed, just diverting what is necessary. Its a parallel pressure drop if you will, and as it gets colder outside, it produces even less resistance to flow.

Quite proporional if you will.

I ran into a combination one and two pipe system on an apartment complex built in the early 40's. It looked like there was TWO different thinking pipe crews on this job. If allowed to run wild, the one pipe system steal flow and pressure differential from the 2 pipe system. There was originaly one large HV pump, and we paralleled 3 smaller circulators and stage them based on OSA temps..

Reduced their energy bill by 30 %, and that was BEFORE we really fine tuned the system.

ME

RonWHC

As always,

the devil is in the details. Tough enough getting flow right w/ balancers @ emitters, & the usual square head cock(s) @ the end of each main. Add in a few folks who like it cool, & what happens to those @ the end, who want it warm? Particularly those below the main, who even w/ 2 tees, need that (pro)portion the TRV(s) just stole?

Think I'll stay w/ ODR - minus the TRVs. At least until some advanced imagineering kicks in.

Boilerpro_5

I just recieved some feedback from a recent job....

I did a one pipe monoflow system in a church with a 30F loop drop at design and everything is working great. The system uses the onboard Prestige outdoor reset with parellel shift for setback. The High curve is set quite high to recover the spaces from setback and despite the fact the valves will tend to close down, it still heats just fine. The boiler probably likes the higher delta tee too.

Boilerpro

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